Filter came fast as promised. Installed it in a 2007 Tiffin motor home with 400 Cummins deisel pusher. Little too early to tell exactly the mileage improvement but it is definitely better. Pulls hills better and am guessing at this point maybe up to .5 mpg improvement.

Steve Foutz,
Grants Pass, Oregon

Was the right part. Web order easy to do. Took five days to get delivered, but we were out on the date scheduled on the tracking link.

I was a little leery about it, but it was the best thing I did for my motorhome. I have a 330 Cummins in my bus and I can go up the mountain passes about 10 miles an hour faster than before. Seems to be getting better fuel mileage too, but haven't checked it yet. I'm impressed, didn't think there would be that much of a difference.